This study was mainly to observe the performance of seismic-damaged reinforced concrete (RC) beam-column joints repaired by different retrofit schemes, RC jacketing and reactive powder concrete (RPC) joint-core replacement. Four interior joints, JI for as-built joint, JI-UR1 for undamaged joint retrofitted by RC jacketing, JI-DR1 for damaged joint repaired by RC jacketing, and JI-DR2 for damaged joint replaced by RPC, were chosen as test specimens. Experimental results showed that JI-DR2 and JI-UR1 have similar seismic resistance and better performance than JI-DR1. They all satisfied code-specified requirement on member ductility. However, a phenomenon of premature joint slip was found in the interface between new and old concrete of the joint JI-DR1. This implies that non-dowel RC jacketing is not suitable for the repair of earthquake-damaged beam-column joints. Besides RC jacketing, other repair scheme on the replacement of core joint by RPC may be adopted as an alternative way for the retrofit of damaged beam-column joints.
|Number of pages||9|
|Journal||Journal of the Chinese Institute of Civil and Hydraulic Engineering|
|State||Published - Sep 2007|
- Beam-column joint
- Reactive powder concrete
- Reinforced concrete jacketing
- Seismic performance